Astronomers discover six planets orbiting a nearby sun-like star
天文新发现:6颗系外行星和谐“共舞”40亿年
Astronomers have discovered a six-pack of planets,formed at least 4 billion years ago and remarkably unchanged since. orbiting a nearby sun-like star.The new planets,described in a paper published Wednesday in the journal Nature,could provide a breakthrough in the understanding of how planets form and why there are so many between the sizes of Earth and Neptune, a class known as“sub Neptunes”that is astoundingly common in our galaxy.
天文学家发现了六颗行星围绕着附近的一顺类太阳恒星运行,它们至少形成于40亿年前,且至今没有发生过明显变化。
周三发表在《自然》杂志上的一篇论文对这些新发现的行星进行了描述,这将为人们了解行星的形成过程,以及为何存在如此多大小介于地球和海王星之间的行星提供一个突破口,这一类行星被称为“亚海王星",在我们的银河系中的常见程度令人震惊。
来自华盛顿邮报(The Washington Post)
今日生词
breakthroughn.突破,重大进展
sub Neptune亚海王星
astoundingly adv.令人惊奇地
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